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F: Technology Overview

LTE

LTE (Long Term Evolution) is a 4th-generation wireless standard.

The 3GPP Release 8 specification outlines the features and

requirements.

Key features include.

• Peak data rate:

· 100 Mbps DL within 20 MHz bandwidth

(Peak DL data rate in 10 MHz bandwidth: 70 Mbps (approx.) for

Cat 3 device)

· 50 Mbps UL within 20 MHz bandwidth

Actual throughput depends on the network configuration, band-

width assigned to the UE, the number of users, and RF signal

conditions.

• Up to 200 active users in a cell (5 MHz)

• Less than 5 ms user-plane latency

• Supported bandwidths: 1.4/3/5/10/15/20 MHz (See Ta bl e 4 - 2

on page 46 for band-specific support.)

• Spectrum flexibility: 1.4–20 MHz (3–20 MHz in future F/W

release)

• Enhanced support for end-to-end QOS

• Frequency Division Duplexing (FDD)

• Physical layer uses:

· DL: OFDMA (Orthogonal Frequency Division Multiple Access).

Modulation: QPSK, 16QAM, and 64QAM

· UL: Single Carrier FDMA (single carrier modulation and

orthogonal frequency multiplexing)

Modulation: QPSK and 16QAM

• MIMO (Multi-Input Multi-Output) antenna support

UMTS

The Universal Mobile Telecommunications System (UMTS)

specification is the 3G mobile systems standard based on an

evolution of GSM core network components. High-speed 3G systems

implementing the UMTS standard enable improved performance for

wireless data applications, delivery of enhanced multimedia content,

and improved network capacity to support additional subscribers.

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Sierra Wireless Writing an embedded application loader Specifiche Pagina 95